Learning Elasticsearch

Array

There is no special data type for an array. A field can contain one or more fields of the same data type. Let's look at an example where we have two documents, as shown next:

Document 1:

{ "keyword_field" : "keyword1" }

Document 2:

{   "keyword_field" : ["keyword2", "keyword3"]}

The mapping for keyword_field is defined as shown next:

{   "properties": {     "keyword_field": {       "type": "keyword"     }   } }

No special handling is required for arrays.